Definition: You are given a question on college mathematics. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Which of the following is NOT a group?
(A)The integers under addition (B)The nonzero integers under multiplication (C)The nonzero real numbers under multiplication (D)The complex numbers under addition

B